RedstoneFox441
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Given: ΔABC

Prove: All three angles of ΔABC add up to 180°.


The flowchart with missing reason proves the measures of the interior angles of ΔABC total 180°:


Which reason can be used to fill in the numbered blank space?


Definition of Supplementary Angles

Substitution

Definition of Complementary Angles

Angle Addition Postulate

Given ΔABCProve All three angles of ΔABC add up to 180The flowchart with missing reason proves the measures of the interior angles of ΔABC total 180Which reason class=
Given ΔABCProve All three angles of ΔABC add up to 180The flowchart with missing reason proves the measures of the interior angles of ΔABC total 180Which reason class=

Respuesta :

mhanifa

Answer:

  • B. Substitution

Step-by-step explanation:

It shows combination of:

  • m∡EBD = 180° and
  • m∡EBC + m∡CBA + m∡DBA = m∡EBD

m∡EBD in the first equation is substituted with 180° in the second and it results in:

  • m∡EBC + m∡CBA + m∡DBA = 180°

Correct choice is:

  • B. Substitution

Answer:

i took the test and i can assure that anser is substitution

Step-by-step explanation:

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